Ampere-hour to Milliampere-hour Converter
Enter the value that you want to convert ampere-hour (Ah) to milliampere-hour (mAh) or milliampere-hour to ampere-hour.Also written as AH to MAH conversion.
1 ampere-hour = 1000.0000000 milliampere-hour
Formula: milliampere-hour = ampere-hour value × 1000.0000000
AH to MAH — ampere-hour to milliampere-hour
10 ampere-hour = 10000.00000 milliampere-hour
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Converting Ampere-hour to Milliampere-hour
The Ampere-hour in Electrical Systems
Ampere-hour (Ah) is a unit of charge measurement. 1 ampere-hour is equal to 1000.0000000 milliampere-hour.
The Milliampere-hour in Electrical Systems
Milliampere-hour (mAh) is a unit of charge measurement. 1 milliampere-hour is equal to 0.0010000 ampere-hour.
Electric Charge in Practice
Charge conversions are essential in battery technology, electrochemistry, and particle physics. Battery capacity (ampere-hours and milliampere-hours) must convert to coulombs for electrochemical calculations. The faraday constant connects moles of electrons to coulombs in electrolysis. Capacitor specifications and static discharge calculations also require precise charge unit conversion.
ampere-hour to milliampere-hour metric conversion table
| 0.01 Ah | = | 10.00000 mAh |
| 0.1 Ah | = | 100.00000 mAh |
| 1 Ah | = | 1000.00000 mAh |
| 2 Ah | = | 2000.00000 mAh |
| 3 Ah | = | 3000.00000 mAh |
| 4 Ah | = | 4000.00000 mAh |
| 5 Ah | = | 5000.00000 mAh |
| 6 Ah | = | 6000.00000 mAh |
| 7 Ah | = | 7000.00000 mAh |
| 8 Ah | = | 8000.00000 mAh |
| 9 Ah | = | 9000.00000 mAh |
| 10 Ah | = | 10000.00000 mAh |
| 11 Ah | = | 11000.00000 mAh |
| 12 Ah | = | 12000.00000 mAh |
| 13 Ah | = | 13000.00000 mAh |
| 14 Ah | = | 14000.00000 mAh |
| 15 Ah | = | 15000.00000 mAh |
| 16 Ah | = | 16000.00000 mAh |
| 17 Ah | = | 17000.00000 mAh |
| 18 Ah | = | 18000.00000 mAh |
| 19 Ah | = | 19000.00000 mAh |
| 20 Ah | = | 20000.00000 mAh |
| 30 Ah | = | 30000.00000 mAh |
| 40 Ah | = | 40000.00000 mAh |
| 50 Ah | = | 50000.00000 mAh |
| 60 Ah | = | 60000.00000 mAh |
| 70 Ah | = | 70000.00000 mAh |
| 80 Ah | = | 80000.00000 mAh |
| 90 Ah | = | 90000.00000 mAh |
| 100 Ah | = | 100000.00000 mAh |
| 200 Ah | = | 200000.00000 mAh |
| 300 Ah | = | 300000.00000 mAh |
| 400 Ah | = | 400000.00000 mAh |
| 500 Ah | = | 500000.00000 mAh |
| 600 Ah | = | 600000.00000 mAh |
| 700 Ah | = | 700000.00000 mAh |
| 800 Ah | = | 800000.00000 mAh |
| 900 Ah | = | 900000.00000 mAh |
| 1000 Ah | = | 1000000.00000 mAh |
How to Convert AH to MAH (Ampere-hour to Milliampere-hour)?
We can convert ampere-hour to milliampere-hour by using an example.
Example:
Convert 20 Ampere-hour to Milliampere-hour?
We know 1 Ampere-hour = 1000.0000000 milliampere-hour; 1 Milliampere-hour = 0.0010000 ampere-hour.
20 ampere-hour = ___mAh
20 × 1000.0000000 = 20000.00000 mAh (we know 1 ampere-hour = 1000.0000000 milliampere-hour)
Answer:
20 ampere-hour = 20000.00000 milliampere-hour
Amp-Hours to Milliamp-Hours: Scaling Battery Capacities
Amp-hours (Ah) are used for larger batteries — cars, solar systems, UPS units — while milliamp-hours (mAh) are used for smaller devices like phones and tablets. Since "milli" means thousandth, 1 Ah = 1,000 mAh. This conversion is needed when comparing different battery sizes or calculating how many phone charges a larger battery can provide.
- Take the battery capacity in amp-hours (Ah).
- Multiply by 1,000.
- The result is the capacity in milliamp-hours (mAh).
- Example: 2.5 Ah × 1,000 = 2,500 mAh.
Ah to mAh: Battery Size Comparison
Common battery capacities expressed in both units to compare across device categories:
| Ampere-hour | Milliampere-hour |
|---|---|
| 0.2 Ah | 200 mAh |
| 0.5 Ah | 500 mAh |
| 2.5 Ah | 2,500 mAh |
| 3.5 Ah | 3,500 mAh |
| 5 Ah | 5,000 mAh |
| 10 Ah | 10,000 mAh |
| 50 Ah | 50,000 mAh |
| 100 Ah | 100,000 mAh |
Examples: Ah to mAh Conversion
Question 1: A LiFePO4 cell is rated at 3.2 Ah. Express in mAh for consumer comparison.
Solution:
mAh = Ah × 1,000
= 3.2 × 1,000
= 3,200 mAh
Answer: 3.2 Ah = 3,200 mAh — similar capacity to a mid-range smartphone.
Question 2: An EV battery module is rated 50 Ah. How many mAh?
Solution:
mAh = Ah × 1,000
= 50 × 1,000
= 50,000 mAh
Answer: 50 Ah = 50,000 mAh — enough to charge a 5,000 mAh phone 10 times (at same voltage).
Question 3: A RC car battery pack is 5.2 Ah. Convert to mAh.
Solution:
mAh = Ah × 1,000
= 5.2 × 1,000
= 5,200 mAh
Answer: 5.2 Ah = 5,200 mAh — provides good runtime for a 1/10 scale RC car.
Practice: Ah to mAh
Try solving these on your own to test your understanding:
- Convert 1.5 Ah to mAh. (Answer: 1,500 mAh)
- A battery is rated 7.5 Ah. What is that in mAh? (Answer: 7,500 mAh)
- Convert 0.3 Ah to mAh. (Answer: 300 mAh)
- A solar battery stores 200 Ah. Express in mAh. (Answer: 200,000 mAh)
- Convert 2.2 Ah to mAh. (Answer: 2,200 mAh)
The 18650 Cell: The Building Block of Modern Batteries
The 18650 Li-ion cell (18mm × 65mm) is the standard building block for laptop batteries, power tools, EVs, and power banks. A single cell is typically 2,500-3,500 mAh (2.5-3.5 Ah) at 3.6-3.7V nominal. Tesla uses thousands of these cells in parallel and series to build EV packs. When you see a "20,000 mAh power bank," it usually contains 4-6 cells of 2,500-3,500 mAh each wired in parallel.
Energy vs. Capacity: Why mAh Is Not the Whole Story
Two batteries can have the same mAh but different energy. A 5,000 mAh battery at 3.7V stores 18.5 Wh, while a 5,000 mAh battery at 7.4V (2S LiPo) stores 37 Wh — twice the energy. When comparing batteries across different voltages (phone vs. laptop vs. EV), use watt-hours (Wh = Ah × V) not just mAh. The mAh rating only tells the full story when comparing batteries at the same voltage.
Key Takeaways
- Multiply Ah by 1,000 to get mAh.
- 1 Ah = 1,000 mAh — simply move the decimal point three places.
- An 18650 cell: 2.5-3.5 Ah = 2,500-3,500 mAh.
- mAh alone does not indicate total energy — voltage matters too (Wh = Ah × V).
- Car batteries use Ah; phone batteries use mAh — same concept, different scale.
Ampere-hour to Milliampere-hour Conversion Formula
milliampere-hour = ampere-hour × 1000.0000000
1 ampere-hour = 1000.0000000 milliampere-hour
1 milliampere-hour = 0.0010000 ampere-hour
Reverse: ampere-hour = milliampere-hour × 0.0010000
Frequently Asked Questions
How many milliampere-hour are in 1 ampere-hour?
There are 1000.0000000 milliampere-hour in 1 ampere-hour. To convert ampere-hour to milliampere-hour, multiply the value by 1000.0000000.
How do I convert ampere-hour to milliampere-hour?
Multiply your ampere-hour value by 1000.0000000 to get the equivalent in milliampere-hour. For example, 5 ampere-hour = 5 × 1000.0000000 = 5000.00000 milliampere-hour.
How do I convert milliampere-hour to ampere-hour?
Multiply your milliampere-hour value by 0.0010000 to get the equivalent in ampere-hour. Alternatively, divide by 1000.0000000.
What is 10 ampere-hour in milliampere-hour?
10 ampere-hour is equal to 10000.00000 milliampere-hour.
What is 100 ampere-hour in milliampere-hour?
100 ampere-hour is equal to 100000.00000 milliampere-hour.